It's the system of financing the voting system is what's wrong. Influence and Lobbying
It actually goes further than that, you want to get to the real root of the problem? start with education and spirituality.
People need information that isn't controlled by people that want to deny the world the truth, and the most important way to bring about the truth is practicing some kind of spiritual life (even if you dont believe in god). 80% of the people in the U.S dont do much work on their spiritual life, hence we have adults that are still kids trying to run a country when they cant even control their own lives.
The power of now is a good book for a starting point.